Question about the Shooter Ballistic Program?

I have established using the tall target test that my NF turrets are .262 MOA. My actual velocity is 2902. I can correct for the turret error using a velocity of 2962. POI has been confirmed out to 1000 yards with this correction entered into Shooter(also corrects using my G7 RF). I am trying to figure out how to use the velocity of 2902 and correct for my turret difference in the Shooter program. I thought that this could be done in the rifle file where you can plug in a vertical correction factor. When I plug in a correction factor of .952 which is the factor to compensate for the turret difference the drop chart gives the new drop data for MOA which matches up perfectly with the 2902 velocity drops and I can use these for my correction, but the drop in inches is not corrected in the chart and reads for .25MOA used with a velocity of 2902. Am I dong something wrong. The program doesn't have a place to enter custom turret values. Any help would be appreciated.

Maybe I'm missing something here but to me it doesn't matter what velocity I have. It's just an input and once I'm verified out to 1000+ yards that's all that matters. If using xxxx velocity doesn't get you first round hits but changing to yyyy velocity does then use the one that works.

Maybe I'm missing something here but to me it doesn't matter what velocity I have. It's just an input and once I'm verified out to 1000+ yards that's all that matters. If using xxxx velocity doesn't get you first round hits but changing to yyyy velocity does then use the one that works.

I agree. I have been doing that and it works well. I have had no problem shooting out to 1436 yards, the furthest I have shot, using the recalibrated velocity. I have been doing this for quite a few years, particularly with the inaccurate/inconsistent chronograph performance. I almost always had to true up with a corrected velocity. When I got my Magnetospeed I found that it is very accurate. Using the Litz verified BC bullets, precise velocity, and corrected turret movement, the bullets go exactly where they are supposed to without having to correct While it's not absolutely necessary for the shooting I do, I thought it would be nice to use all actual values if I could. I also understand that it is preferable to use actual velocity if shooting in the transonic region. I may have to go to a more advanced program to do this. For now I would just like to be able to enter corrected turret values in Shooter if it's possible.

I have established using the tall target test that my NF turrets are .262 MOA. My actual velocity is 2902. I can correct for the turret error using a velocity of 2962. POI has been confirmed out to 1000 yards with this correction entered into Shooter(also corrects using my G7 RF). I am trying to figure out how to use the velocity of 2902 and correct for my turret difference in the Shooter program. I thought that this could be done in the rifle file where you can plug in a vertical correction factor. When I plug in a correction factor of .952 which is the factor to compensate for the turret difference the drop chart gives the new drop data for MOA which matches up perfectly with the 2902 velocity drops and I can use these for my correction, but the drop in inches is not corrected in the chart and reads for .25MOA used with a velocity of 2902. Am I dong something wrong. The program doesn't have a place to enter custom turret values. Any help would be appreciated.

Are you sure your turrets are .262 MOA and not . 262 Inch because .262 x 4 = 1.048 exactly the inch size of 1 MOA at 100 yards ?
If they moved .262 MOA at 100 yards per click then 4 clicks would move 1.0976 inch at 100 yards . You need to explain what you think is your turret difference in less words . Because what I see so far leeds me to believe you have 1/4 minute clicks . I may be miss understanding you .
Shooter can be adjusted to read out in MOA , mils , scope clicks what ever you need . The data like velocity , BC's , sight height , slope range etc etc and Atmospheric data go in and then you make the program read out in what calibartion you need .
Any BC or velocity trimming you do to equal real world dope is a seperate issue to what calibration you choose to match and use on the scope .
What you have to be careful of is that the trimming of velocity or BC to match your real world dope has to be done with the same atmospheric and slope range that you experience on the shooting day otherwise you could just be trimming to equal out differing atmosphere and range conditions .
Under those conditions it will not be as accurate on another day in another place.

However, I'm a bit surprised that your nf is .264 MOA/click. Makes me wanna check mine on the big gun.

I, personally, am much more comfortable with actual inputs.

Thanks Roy, I will send sn e-mail off to Shooter. I began testing turret accuracy when I started shooting my 6.5x284's several years ago. Shooters were reporting velocities that were much higher than I was getting. I have had a number of different scopes that were typically 3-6% higher that stated. Mostly NF and MK4's. Interestingly, and perhaps just luck, I had mounted Huskemaws on my 6.5x284's and both scopes were within 1% of the stated 1/3MOA/click. When I got my Magnetospeed I retested my velocities and drop data for these rifles and they were right on the actuals that were calculated in the ballistic program. I was surprised when I tested my three NF scopes, all running 4-5% high. This error overstates my velocities by 40-60FPS in my 300WM when actual drops are determined during field testing. In the case of my current 300WM it required a 1MOA correction at 1000 yards. I suspect that many of the "true" velocities that are quoted by shooters may not be so true because of turret error.

Greyfox, I can not tell what you have going on. But I do believe you are on the right track. The difference between simply adjusting Velocity is it has a different effect across the board. BC, a slightly different effect and stepped BC's sometimes are also needed. When adjusting a turret calibration value, the difference is as you go out farther with a shot you dial more moa. If you have an error in turret calibration and are not spot on .25 moa this error will multiply as you shoot farther. These errors are very hard to detect at 100 yards, 200 yards or 300 yards. But start shooting past 1000, if they are truly there, they will show their ugly heads. I have found this to be the culprit with many scopes where I was satisfied with my drop being on to 1000 but then they were not so good farther out.

I input the real average MV from a good chronograph. I use Magneto speed and Oehler. Then with the brand bullets I use I have proved BC's to be accurate, so I use the advertised BC. Then I go out and shoot drops out to as far as I will be using the rifle to hunt. If I find an increasing error with distance I adjust the turret calibration value to get it to come in. I usually do not have to change my MV much. Usually within the velocity spread of the ES string. Same with BC's. Only slight adjustments and only if needed for a fine tune.